def test_node_degree(self):
alice = Node("Person", name="Alice")
bob = Node("Person", name="Bob")
carol = Node("Person", name="Carol")
self.graph.create(alice)
assert alice.degree() == 0
self.graph.create(Path(alice, "KNOWS", bob))
assert alice.degree() == 1
self.graph.create(Path(alice, "KNOWS", carol))
assert alice.degree() == 2
self.graph.create(Path(carol, "KNOWS", alice))
assert alice.degree() == 3
